/*
 * The contents of this file are subject to the terms of the Common Development and
 * Distribution License (the License). You may not use this file except in compliance with the
 * License.
 *
 * You can obtain a copy of the License at legal/CDDLv1.0.txt. See the License for the
 * specific language governing permission and limitations under the License.
 *
 * When distributing Covered Software, include this CDDL Header Notice in each file and include
 * the License file at legal/CDDLv1.0.txt. If applicable, add the following below the CDDL
 * Header, with the fields enclosed by brackets [] replaced by your own identifying
 * information: "Portions Copyright [year] [name of copyright owner]".
 *
 * Copyright 2010 Sun Microsystems, Inc.
 * Portions copyright 2012 ForgeRock AS.
 */

package org.forgerock.opendj.ldap.requests;

import org.forgerock.i18n.LocalizedIllegalArgumentException;
import org.forgerock.opendj.ldap.ByteString;
import org.forgerock.opendj.ldap.DecodeException;
import org.forgerock.opendj.ldap.DecodeOptions;
import org.forgerock.opendj.ldap.ResultCode;
import org.forgerock.opendj.ldap.controls.Control;
import org.forgerock.opendj.ldap.responses.AbstractExtendedResultDecoder;
import org.forgerock.opendj.ldap.responses.ExtendedResult;
import org.forgerock.opendj.ldap.responses.ExtendedResultDecoder;
import org.forgerock.opendj.ldap.responses.Responses;
import org.forgerock.opendj.ldap.responses.WhoAmIExtendedResult;

/**
 * Who Am I extended request implementation.
 */
final class WhoAmIExtendedRequestImpl extends
        AbstractExtendedRequest<WhoAmIExtendedRequest, WhoAmIExtendedResult> implements
        WhoAmIExtendedRequest {

    static final class RequestDecoder implements
            ExtendedRequestDecoder<WhoAmIExtendedRequest, WhoAmIExtendedResult> {

        @Override
        public WhoAmIExtendedRequest decodeExtendedRequest(final ExtendedRequest<?> request,
                final DecodeOptions options) throws DecodeException {
            // TODO: Check the OID and that the value is not present.
            final WhoAmIExtendedRequest newRequest = new WhoAmIExtendedRequestImpl();
            for (final Control control : request.getControls()) {
                newRequest.addControl(control);
            }
            return newRequest;
        }
    }

    private static final class ResultDecoder extends
            AbstractExtendedResultDecoder<WhoAmIExtendedResult> {
        @Override
        public WhoAmIExtendedResult decodeExtendedResult(final ExtendedResult result,
                final DecodeOptions options) throws DecodeException {
            if (result instanceof WhoAmIExtendedResult) {
                return (WhoAmIExtendedResult) result;
            } else {
                final WhoAmIExtendedResult newResult =
                        Responses.newWhoAmIExtendedResult(result.getResultCode()).setMatchedDN(
                                result.getMatchedDN()).setDiagnosticMessage(
                                result.getDiagnosticMessage());

                final ByteString responseValue = result.getValue();
                if (responseValue != null) {
                    try {
                        newResult.setAuthorizationID(responseValue.toString());
                    } catch (final LocalizedIllegalArgumentException e) {
                        throw DecodeException.error(e.getMessageObject());
                    }
                }

                for (final Control control : result.getControls()) {
                    newResult.addControl(control);
                }

                return newResult;
            }
        }

        @Override
        public WhoAmIExtendedResult newExtendedErrorResult(final ResultCode resultCode,
                final String matchedDN, final String diagnosticMessage) {
            return Responses.newWhoAmIExtendedResult(resultCode).setMatchedDN(matchedDN)
                    .setDiagnosticMessage(diagnosticMessage);
        }
    }

    /** No need to expose this. */
    private static final ExtendedResultDecoder<WhoAmIExtendedResult> RESULT_DECODER =
            new ResultDecoder();

    /** Prevent instantiation. */
    WhoAmIExtendedRequestImpl() {
        // Nothing to do.
    }

    WhoAmIExtendedRequestImpl(final WhoAmIExtendedRequest whoAmIExtendedRequest) {
        super(whoAmIExtendedRequest);
    }

    @Override
    public String getOID() {
        return OID;
    }

    @Override
    public ExtendedResultDecoder<WhoAmIExtendedResult> getResultDecoder() {
        return RESULT_DECODER;
    }

    @Override
    public ByteString getValue() {
        return null;
    }

    @Override
    public boolean hasValue() {
        return false;
    }

    @Override
    public String toString() {
        final StringBuilder builder = new StringBuilder();
        builder.append("WhoAmIExtendedRequest(requestName=");
        builder.append(getOID());
        builder.append(", controls=");
        builder.append(getControls());
        builder.append(")");
        return builder.toString();
    }
}
